Re: How to mount CD-ROM?

[Arthur Othieno <arthurothieno@gmx.net>]

cr wrote:

> I'm having trouble reading my CD-ROM (actually a LG(Goldstar) 8080 cd-writer) 
> drive.


You are having trouble reading CD-ROM discs in your CD-RW drive, am I right?


> It's not a hardware problem, and it worked in previous RH versions.  (It also 
> installed my current RH 7.2 system quite happily).
> 
> My /etc/fstab reads   
> /dev/cdrom     /mnt/cdrom    iso9660 noauto,owner,kudzu,ro 0 0
> 
> But, even su root, trying to mount it with (from memory):
> mount  /dev/hdb  /mnt/cdrom    
> gave (from memory)   'unknown block device'.
> 
> Trying X-cd-roast told me that ide-scsi was missing.  
> 
> Trying   insmod sg    told me that  sg  was already installed, and 
> 'insmod  ide-scsi'   successfully loaded  ide-scsi, after which X-cd-roast 
> now reads a CD   OK (and presumably, would write).
> 
> However, I *still* can't mount or read a CD-rom in the normal way, from the 
> command line.
> 
> This is what happens:
> [root@localhost /]# mount -t iso9660  /dev/hdb  /mnt/cdrom
> "mount: bad fs type, bad option, bad superblock on /dev/hdb, or too many 
> mounted file systems
> (could this be the IDE device where you in fact use ide-scsi so that sr0 or 
> sda or so is needed?)"


You can't mount your CD-RW as hdb since it's now being emulated as a SCSI device. Try 

mounting it with `mount /dev/scd0 /mnt/cdrom' and see if that works (assuming this is 

done with ide-scsi et al currently loaded). You might also want to 
change the symlink `cdrom' in /dev to point to `scd0', something like 
(as root): `cd /dev ; rm cdrom ; ln -sf scd0 cdrom'

The only questions that remain to be answered are:

(1) Do you want to use your CD-RW drive *only* for reading CD-ROM media 
(which I doubt is the case here), or
(2) Do you want to use it to read and write CD-ROM/CD-R(W) media (which 
is a more practical use)?

For the latter, you will have to tell the IDE CD-ROM driver to ignore 
hdb all together, and assign ide-scsi to hdb at boot. More specific 
details can be gleaned from the CD-Writing HOWTO ;)


> [root@localhost /]# mount  -t iso9660  /dev/scsi0  /mnt/cdrom
> "mount: special device  /dev/scsi0 does not exist"
> 
> - and the same result for sda, sr0, and so  when I try it, except that 
> /dev/sda  gives 'unknown device' instead.
> 
> If I try this:
> [root@localhost /]# mount  /dev/hdb  /mnt/cdrom
> I get:
> "dev/hdb: success
> mount: you must specify the filesystem type"
> 
> But when I cd into  /mnt/cdrom, there are still no files visible...

> 
> So it doesn't want to know me, either as a IDE or a SCSI drive.   
> dmesg shows it correctly:
> "hdb: LG CD-RW CED-8080B, ATAPI  CD/DVD-ROM drive
> ............
> Type: CD-ROM      ANSI SCSI Revision: 02"
> 
> I've tried reading the CDROM  HOWTO, but I can't see anything there that 
> explains the problem.   Does anyone have any suggestions what to try next?
> 
> Chris Rodliffe
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> 
> 

HTH,

Arthur

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